Enterprise versions of Linux based on kernel 2.6, and 64 bit database servers are now very mature. Dual core 64 bit Opteron and 64 bit Xeons with 2 MB L2-caches are available. It was definitely time to update our previous Linux Database Server CPU comparison.
In this article, you will find a comparison of the latest Xeon (Irwindale), the previous Xeon (Nocona), the old Xeon (Galatin), the Dual core Opteron, and the "normal" Opteron, of course. We also included the Pentium-D to get an idea of what a Dual core Xeon could do, although the comparison is not completely fair: the memory subsystem of a Dual core Xeon will have higher latency and slightly lower bandwidth as it will use ECC buffered DIMMs instead of non-buffered DIMMs.
The article continues at http://www.anandtech.com/IT/showdoc.aspx?i=2447